POST UTME AAUA 2025 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A heat engine operates between 300 K and 400 K. If the efficiency is 30%, what is the temperature of the hot reservoir?
A. 350 K
B. 400 K
C. 450 K
D. 500 K
Question 2
A particle of mass 1 kg is moving in a circular path of radius 2 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal force of 9 N, what is the angular velocity of the particle?
A. 1.5 rad/s
B. 3 rad/s
C. 4.5 rad/s
D. 6 rad/s
Question 3
A block of mass 2 kg is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the maximum speed of the block.
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 4
A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capaci\tance of the capacitor is 10^-6 F, what is the charge stored on the capacitor when a potential difference of 10 V is applied across it?
A. 10^-5 C
B. 10^-4 C
C. 10^-3 C
D. 10^-2 C
Question 5
A capacitor consists of two parallel plates, each with an area of 0.1 m^2 and separated by a dis\tance of 0.01 m. If the capaci\tance is 10^-6 F, determine the charge stored on one plate when a potential difference of 10 V is applied across the capacitor.
A. 10^-8 C
B. 10^-7 C
C. 10^-6 C
D. 10^-5 C
Question 6
A 50Omega resistor is connected in parallel with a 100Omega resistor. What is the equivalent resis\tance?
A. 25Omega
B. 30Omega
C. 50Omega
D. 75Omega
Question 7
A body of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. What is the magnitude of the centripetal acceleration?
A. v^2/r
B. v/r
C. r/v
D. v^2
Question 8
A magnetic field of 0.5 T is applied to a current-carrying wire. If the current in the wire is 2 A, what is the force experienced by the wire?
A. 0.5 N
B. 1 N
C. 2 N
D. 5 N
Question 9
A 5% saline solution is prepared by dissolving 5g of NaCl in 95g of water. What is the molar concentration of the solution?
A. 0.05 M
B. 0.1 M
C. 0.2 M
D. 0.25 M
Question 10
A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 1.2 atm, what is the final pressure?
A. 1.5 atm
B. 2.0 atm
C. 2.5 atm
D. 3.0 atm
Question 11
A 5.0 kg block is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 0.25 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, determine the maximum speed of the block.
A. 2.5 m/s
B. 5.0 m/s
C. 10.0 m/s
D. 20.0 m/s
Question 12
A force of 10 N acts on an object, cau\sing it to accelerate at 2 m/s^2. What is the mass of the object?
A. 5 kg
B. 10 kg
C. 15 kg
D. 20 kg
Question 13
A wave with a frequency of 50 Hz and a wavelength of 0.5 m is traveling through a medium. If the wave has a speed of 20 m/s, determine the amplitude of the wave.
A. 0.01 m
B. 0.1 m
C. 0.5 m
D. 1.0 m
Question 14
A radioactive sample has a half-life of 10 years. If the initial activity is 100Bq, what is the activity after 20 years?
A. 12.5Bq
B. 25Bq
C. 50Bq
D. 100Bq
Question 15
A gas is enclosed in a container of volume 0.1 m^3 at a temperature of 300 K. If the gas is heated to a temperature of 400 K, what is the new volume of the gas?
A. 0.12 m^3
B. 0.15 m^3
C. 0.18 m^3
D. 0.2 m^3

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: